At 14:19 this afternoon units responded to the Walnut Springs Nursery in the 3000 block of Route 97 for the reported barn on fire. The caller advised that the structure was used to store plant pots and that there were no animals or chemicals inside. Units arrived to find two large structures fully involved and began defensive operations. Water Supply 3 and Carroll Engine 124 set up draft sites to supply Engine 41, Engine 131, Tower 3, and Tower 2. Units operated on scene for several hours and requested Howard County Bureau of Highways to respond with heavy equipment to assist with overhaul. Canteen 1 (currently housed at WFVFD) responded to provide drinks and dinner to personnel working on scene. The cause of the fire is under investigation by the Howard County Office of the Fire Marshal. Units cleared at 21:47.